tree 9377024c6fad1d4eb05c1e3be4557c5dd031b950
parent 8e7fdf4ac460cbfbb373c951a6c7cdae93446241
author Andreas Sandberg <andreas.sandberg@arm.com> 1520350593 +0000
committer Andreas Sandberg <andreas.sandberg@arm.com> 1523954712 +0000

mem: Add a helper function to get a word of variable length

There are many devices that need to handle reads/writes of different
word sizes. A common pattern is a switch statement that check for the
size of a packet and then calls the corresponding
Packet::(get|set)<uintXX_t> methods. Simplify this by implementing
Packet::(get|set)UintX helper functions.

The getter reads a word of the size specified in the packet and the
specified endianness. The word is then zero-extended to 64
bits. Conversely, the setter truncates the word down to the size
required in the packet and then byte-swaps it to the desired
endianness.

Change-Id: I2f0c27fe3903abf3859bea13b07c7f5f0fb0809f
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/9761
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>